It is one of those data science tools which are specifically designed for statistical operations. SAS is a closed source proprietary software that is used by large organizations to analyze data. SAS uses base SAS programming language which for performing statistical modeling.
It is widely used by professionals and companies working on reliable commercial software. SAS offers numerous statistical libraries and tools that you as a Data Scientist can use for modeling and organizing their data.
While SAS is highly reliable and has strong support from the company, it is highly expensive and is only used by larger industries. Also, SAS pales in comparison with some of the more modern tools which are open-source.
Furthermore, there are several libraries and packages in SAS that are not available in the base pack and can require an expensive upgradation.